The go kart:
Objective
My goal was to construct a go-kart entirely from wood, a material not typically used for this purpose. This unconventional choice allowed me to explore principles of materials engineering.
Planning
Design Sketch: I began by drawing a basic outline of the go-kart to conceptualize its structure.
Dimensioning: To determine exact measurements, I outlined the go-kart dimensions directly on my floor using tape, ensuring a clear and accurate layout.
I decided on specific dimensions (5 feet long by 3 feet wide) for the go-kart.
After purchasing the necessary materials, I had the wooden pieces cut to size.
The rear axle, essential for connecting the wheels and enabling their rotation, was my first focus. Due to initial budget constraints, I selected a cost-effective axle. However, this came with challenges:
- T8F chains were unavailable.
- The clutch used on standard go-kart engines was incompatible with T8F chains
Clutch Analogy:
Imagine you're on a merry-go-round. As it spins faster, you feel pushed outward due to centrifugal force. Similarly, in a centrifugal clutch: As the engine spins faster, centrifugal force pushes brake shoes outward. These shoes grip the clutch housing, transferring power from the engine to the wheels.
Proposed Solution for the Sprocket Issue
My first idea was to purchase a sprocket that could attach to the T8F sprocket, combining its teeth with a 420 sprocket to achieve compatibility with the clutch and chain system. (I just bolted the two sprockets together)
Steering System
To address steering challenges, I first studied how a steering system works:
I designed and 3D-printed a piece to stabilize the entire steering assembly and prevent unnecessary movement.
Using the rack-and-pinion mechanism, I developed a method to translate its movement into wheel turns:
When one side of the system was pulled during a turn, it caused the corresponding wheel to turn inward, directing the go-kart appropriately.
Material Challenges
Because the plastic components I initially 3D-printed snapped under weight, I decided to have the same parts made out of steel for added durability and functionality.
